High current efficiency class-AB OTA with high open loop gain and enhanced bandwidth

被引：11
|
作者：
Pourashraf, Shirin [1 ,2 ]
Ramirez-Angulo, Jaime [1 ,2 ]
Roman-Loera, Alejandro [3 ]
Lopez-Martin, Antonio J. [4 ]
Diaz-Sanchez, Alejandro [5 ]
Carvajal, Ramon G. [6 ]
机构：
[1] New Mexico State Univ, Klipsch Sch Elect, Las Cruces, NM 88003 USA
[2] New Mexico State Univ, Dept Comp Sci, Las Cruces, NM 88003 USA
[3] Autonomous Univ Aguascalientes, Aguascalientes, Mexico
[4] Univ Publ Navarra, Dept Elect & Elect Engn, Campus Arrosadia, E-31006 Pamplona, Spain
[5] Inst Nacl Astrofis, Opt Elect, Puebla, Mexico
[6] Univ Seville, Dept Elect Engn, Seville, Spain
来源：
IEICE ELECTRONICS EXPRESS | 2017年 / 14卷 / 17期
关键词：
class-AB; OTA; current efficiency; SLEW RATE; AMPLIFIER; CIRCUITS; STAGE;
D O I：
10.1587/elex.14.20170719
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An efficient class-AB OTA with enhanced output current, slew rate, open loop gain, and gain bandwidth is presented. The circuit is based on a class-AB input stage with adaptive biasing, and an output stage with dynamically biased cascode transistors. It can deliver output currents 100 times larger than the bias current with a total quiescent power dissipation of 72 mu W. Measurement results of a 180 nm CMOS test chip prototype show slew rate, gain bandwidth, and open loop gain enhancement.
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页数：5
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